This instrument tuner can be used to tune a wide range of instruments like guitars, pianos, accordions, organs and violins. It is even able to tune the two tones of beating instruments, like the accordion, at once. This chromatic instrument tuner is accurate, fast and easy to use. It runs on a pc or laptop, measures sound using the microphone and detects the tone that is played. The deviation of the tone is displayed using an easy to read gauge.